Revert "Introduce ViewRoot forwarding input/view events to native"

ui/android/java/src/org/chromium/ui/base/ViewRoot.java

Index: ui/android/java/src/org/chromium/ui/base/ViewRoot.java
diff --git a/ui/android/java/src/org/chromium/ui/base/ViewRoot.java b/ui/android/java/src/org/chromium/ui/base/ViewRoot.java
deleted file mode 100644
index c224e8e3ed8c9cdfd31b3ed2e783e090ea42a4e7..0000000000000000000000000000000000000000
--- a/ui/android/java/src/org/chromium/ui/base/ViewRoot.java
+++ /dev/null
@@ -1,50 +0,0 @@
-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package org.chromium.ui.base;
-
-import org.chromium.base.annotations.CalledByNative;
-import org.chromium.base.annotations.JNINamespace;
-
-/**
- * Class used to forward view, input events down to native.
- *
- * TODO(jinsukkim): Add its native counterpart inheriting from ViewAndroid
- *     so that it will act as a root of ViewAndroid tree. It effectively
- *     replaces WindowAndroid in terms of the role.
- */
-@JNINamespace("ui")
-public class ViewRoot {
-    // The corresponding native ViewAndroid. This object can only be used while
-    // the native instance is alive.
-    private long mNativeView;
-
-    @CalledByNative
-    private static ViewRoot create(long nativeView) {
-        return new ViewRoot(nativeView);
-    }
-
-    private ViewRoot(long nativeView) {
-        mNativeView = nativeView;
-    }
-
-    /**
-     * Called when the underlying surface the compositor draws to changes size.
-     * This may be larger than the viewport size.
-     * @param width Width of the physical backing surface.
-     * @param height Height of the physical backing surface.
-     */
-    public void onPhysicalBackingSizeChanged(int width, int height) {
-        assert mNativeView != 0;
-        nativeOnPhysicalBackingSizeChanged(mNativeView, width, height);
-    }
-
-    @CalledByNative
-    private void onDestroyNativeView() {
-        mNativeView = 0;
-    }
-
-    private static native void nativeOnPhysicalBackingSizeChanged(long viewAndroid,
-            int width, int height);
-}